1. Literal Meaning: The English translation for '大嘴巴' is 'big mouth', which refers to a person who talks too much or reveals secrets without thinking of the consequences.
2. Idiomatic Meaning: The idiom '大嘴巴' can also refer to someone who is outspoken, frank or blunt. They tend to speak their mind and express their opinions openly, even if it may offend others.
3. Cultural Meaning: In Chinese culture, '大嘴巴' can also be used to describe someone who is gossipy or spreads rumors. It suggests that the person is not trustworthy and may cause harm to others by spreading false or harmful information.